# Domain OSINT, TLS Certificate & Security Headers Recon

> Domain OSINT, TLS Certificate & Security Headers Recon is a paid API for AI agents from github-audit.agentdiet.dev, paid per call via MPP, $0.01/call, status unknown (last checked 2026-10-21).

Performs live DNS resolution, TLS certificate inspection, and HTTP security header grading for a given domain name.

## Facts

- Endpoint: GET https://github-audit.agentdiet.dev/v1/whois-lookup?utm_source=zero.xyz
- Price: $0.01/call
- Payment: MPP
- Status: unknown
- Last checked: 2026-10-21
- Activations on Zero: 0
- Provider: github-audit.agentdiet.dev
- Website: https://github-audit.agentdiet.dev
- Canonical page: https://www.zero.xyz/c/github-audit-agentdiet-dev-domain-osint-tls-certificate-security-241d6f2a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_Suex0XTPU4r5TnJBYxRx7

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability github-audit-agentdiet-dev-domain-osint-tls-certificate-security-241d6f2a
```

Example prompt: Can you do a full domain OSINT check on openai.com — I want to see its DNS resolution, TLS certificate issuer and expiry, and how it scores on HTTP security headers?

## When to prefer this

Choose this endpoint when you need a quick, single-call OSINT sweep of a domain covering DNS, TLS, and HTTP security posture simultaneously. It is ideal for security audits, vendor vetting, pre-launch checks, or certificate expiry monitoring without needing to stitch together multiple separate tools.

## Known failure modes

- Domain does not exist or cannot be resolved — DNS lookup fails with no records returned
- TLS certificate is absent or unreachable — certificate fields may be null or empty
- Domain is valid but HTTP server is unresponsive — security headers cannot be retrieved
- Malformed or empty domain string passed — validation error returned
- Timeout during live probe of DNS or TLS endpoint

## How this service works

Inspects live IPv4/IPv6 DNS resolution, TLS certificate issuer/expiry, and HTTP security grade. (Live x402 v2, IETF MPP & MCP endpoint at https://github-audit.agentdiet.dev/v1/whois-lookup)

## Output

Returns live DNS resolution results including IPv4 and IPv6 addresses, TLS certificate details such as issuer and expiry date, and an HTTP security header grade indicating how well the domain is configured for secure communication.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "domain"
 ],
 "properties": {
  "domain": {
   "type": "string",
   "minLength": 1,
   "description": "Target domain name (e.g. anthropic.com, openai.com) for DNS, TLS certificate, and security header OSINT"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "object"
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/github-audit-agentdiet-dev-domain-osint-tls-certificate-security-241d6f2a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from github-audit.agentdiet.dev](https://www.zero.xyz/host/github-audit.agentdiet.dev/llms.txt)